One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,5)(6,8)(9,10)(11,13)(12,14)(15,16)(17,18,23,28)(19,24,32,42)(20,26,34,43)(21,27,22,37)(25,36,44,33)(29,45,30,39)(31,40,35,41)(38,46,48,47)(2,5)(6,7)(11,15)(13,16)(17,19,23,32)(18,24,28,42)(20,29,34,30)(21,35,22,31)(25,38,44,48)(26,45,43,39)(27,41,37,40)(33,47,36,46)(3,8)(6,7)(9,11)(10,13)(12,15)(14,16)(17,20)(18,25)(19,29)(21,33)(22,36)(23,34)(24,38)(26,37)(27,43)(28,44)(30,32)(31,46)(35,47)(39,41)(40,45)(42,48) involution — undirected(1,3,4,8)(2,6,5,7)(11,15)(13,16)(17,20)(18,26)(19,30)(21,36)(22,33)(23,34)(24,39)(25,37)(27,44)(28,43)(29,32)(31,46)(35,47)(38,41)(40,48)(42,45)(2,5)(6,7)(10,14)(13,16)(17,21,23,22)(18,27,28,37)(19,31,32,35)(20,33,34,36)(24,40,42,41)(25,43,44,26)(29,46,30,47)(38,45,48,39)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.